Hi Stivva,
See attached photo of 240z with flares - extra wheel width is a matter of personal preference, but if you run the car mainly on the street be carefull as the car will "tramline" with wider wheels.
My car is track only & the bigger "blue" jongbloed wheels are 16x10 rears & 16x9 fronts with 0 offset. I will attached other photos of other wheels (in separate post) performance 15x8 -4 offset.
Regards